On the scalability of Linus

I am considering that the next breakdown may be due to amount of bytes (i.e. patch lines) to be reviewed; something that no agglomeration (single patch files in 2.x -> pulls of rows of commits in git), nor any fanning of the direct pulls (i.e. turning that 100-something-ary tree in the graphic into a, say, 4-ary tree) would solve.